Improvement in expansive bits for wood-boring



c 2 i mi www W. A. IVES, OF NEW HAVEN, CONNECTICUT.

Laim Patent No. 82,956, dem 00mm 13, 186s;

The Schedule referred to in these Lettere Patent and making part of thesame.

Be it known that 1, W. A. IvEs, of New Haven, in the State ofConnecticut, have invented anew and improved Mode of Constructing theExpansive Bit and Auger, and the following is a description thereof.

The improvement consists in the manner of constructing, as well as'seeming and holding firmly in position, the adjustable cutter in thestock.

This is done by the groove B in the stock A, which receives the upperedge of the cutter C, and is Aheld irmly, and forced back therein, bymeans of a wedgingscrew, a, in the slot bin the cutter C. To seciue thecutter more rmly in any desirable position, I insert a set-screw up onthe back of the stock A, which passes' through and upon the edge of thecutter C;

The cutter being held entirely by its upper edge and slot, admits ofsuch an arrangement of its lower and cutting-edge as to do away with thenecessity of any cutters upon the stock, the wood from the centre beingall removed by the cutter'O, and all delivered .upon the front, by whicha very great expense in the construction of the expansive bit is saved.

I claim the mode of holding in place the adjustable cutter C by itsupper edge, by means of the groove B, the wedging-screw a, and slot I)in the cutter C, and set-screw (l, constructed and arrangedsubstantially in the manner as above speciiied.v

I also claim the adjustable cutter, when constructed in such a manner asthat all the Wood is removed Without the necessity of the'ordinary xedcentral cutters upon the stock, substantially as set forth.

v W. A. IVES. Witnesses:

EDWARD H. To'WNsEND, E. J. Ives.

